🌌 Stone's Star System Generator

Asteroid Belt

Center: 0.28 AU

Composition

Type: Inner (Rocky/Metallic)

A dense region of planetesimals and debris.

Boundary

Planet 1 - Terrestrial

Semi-Major Axis: 0.56 AU

Status: Outer (Cold)

Composition: Rocky (Silicates/Metals)

Physical Data

Mass: 2.63

Radius: 1.47

Gravity: 1.22 G

Time & Orbit

Eccentricity (e): 0.124

Orbit Range: 0.49 AU - 0.63 AU

Year: 266 Days

Day: 46 Hours

Environment

Temp: -130 °C

Axial Tilt: 22.6 °

Atmosphere: Thin N₂/CH₄

Biome: Ice Cap/Desert

Planet 2 - Gas Giant

Semi-Major Axis: 0.78 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 415

Radius: 11.8

Gravity: 2.98 G

Time & Orbit

Eccentricity (e): 0.233

Orbit Range: 0.6 AU - 0.96 AU

Year: 438 Days

Day: 9.6 Hours

Environment

Temp: -142 °C

Axial Tilt: 46.6 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (8)

Outer Limit: 82,420,490 km

• M1: 146,756 km (0.1 R)
• M2: 546,780 km (0.073 R)
• M3: 917,185 km (0.06 R)
• M4: 1,295,966 km (0.119 R)
• M5: 1,685,220 km (0.075 R)
• M6: 2,235,890 km (0.096 R)
• M7: 3,335,584 km (0.118 R)
• M8: 4,894,394 km (0.109 R)

Planet 3 - Gas Giant

Semi-Major Axis: 2.37 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 531.7

Radius: 8.8

Gravity: 6.87 G

Time & Orbit

Eccentricity (e): 0.078

Orbit Range: 2.19 AU - 2.55 AU

Year: 2320 Days

Day: 5.8 Hours

Environment

Temp: -205 °C

Axial Tilt: 2.9 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (22)

Outer Limit: 82,420,490 km

• M1: 110,553 km (0.097 R)
• M2: 445,652 km (0.04 R)
• M3: 758,760 km (0.09 R)
• M4: 1,351,018 km (0.069 R)
• M5: 1,696,739 km (0.118 R)
• M6: 2,113,369 km (0.114 R)
• M7: 2,432,611 km (0.047 R)
• M8: 2,858,217 km (0.026 R)
• M9: 3,234,007 km (0.104 R)
• M10: 3,822,824 km (0.072 R)
• M11: 4,143,113 km (0.026 R)
• M12: 4,968,145 km (0.104 R)
• M13: 6,831,686 km (0.103 R)
• M14: 7,980,149 km (0.099 R)
• M15: 9,086,425 km (0.102 R)
• M16: 9,488,395 km (0.098 R)
• M17: 10,007,350 km (0.101 R)
• M18: 10,327,788 km (0.027 R)
• M19: 12,974,923 km (0.057 R)
• M20: 13,920,082 km (0.03 R)
• M21: 14,319,807 km (0.093 R)
• M22: 15,188,672 km (0.099 R)

Planet 4 - Gas Giant

Semi-Major Axis: 3.15 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 323

Radius: 13.4

Gravity: 1.8 G

Time & Orbit

Eccentricity (e): 0.14

Orbit Range: 2.71 AU - 3.59 AU

Year: 3555 Days

Day: 6.3 Hours

Environment

Temp: -212 °C

Axial Tilt: 2.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (14)

Outer Limit: 82,420,490 km

• M1: 170,242 km (0.09 R)
• M2: 786,137 km (0.111 R)
• M3: 1,834,967 km (0.091 R)
• M4: 2,376,362 km (0.106 R)
• M5: 3,694,020 km (0.089 R)
• M6: 5,076,454 km (0.118 R)
• M7: 6,078,461 km (0.075 R)
• M8: 6,668,325 km (0.115 R)
• M9: 7,900,862 km (0.048 R)
• M10: 9,560,202 km (0.044 R)
• M11: 10,137,350 km (0.091 R)
• M12: 12,258,947 km (0.076 R)
• M13: 13,027,880 km (0.058 R)
• M14: 18,224,910 km (0.086 R)

Planet 5 - Gas Giant

Semi-Major Axis: 3.64 AU

Status: Outer (Cold)

Composition: Hydrogen/Helium Atmosphere

Physical Data

Mass: 442.5

Radius: 12.1

Gravity: 3.02 G

Time & Orbit

Eccentricity (e): 0.196

Orbit Range: 2.93 AU - 4.35 AU

Year: 4416 Days

Day: 6.3 Hours

Environment

Temp: -205 °C

Axial Tilt: 22.7 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (21)

Outer Limit: 82,420,490 km

• M1: 150,495 km (0.117 R)
• M2: 575,054 km (0.091 R)
• M3: 1,283,101 km (0.083 R)
• M4: 2,226,316 km (0.113 R)
• M5: 3,527,069 km (0.053 R)
• M6: 4,857,443 km (0.08 R)
• M7: 6,557,323 km (0.09 R)
• M8: 7,235,600 km (0.066 R)
• M9: 7,858,526 km (0.109 R)
• M10: 8,877,886 km (0.085 R)
• M11: 9,904,426 km (0.067 R)
• M12: 10,923,936 km (0.068 R)
• M13: 11,700,349 km (0.111 R)
• M14: 12,147,497 km (0.116 R)
• M15: 13,704,212 km (0.058 R)
• M16: 14,556,322 km (0.104 R)
• M17: 15,981,840 km (0.095 R)
• M18: 17,039,497 km (0.064 R)
• M19: 17,848,073 km (0.108 R)
• M20: 19,417,654 km (0.072 R)
• M21: 21,606,570 km (0.109 R)

Planet 6 - Ice Giant

Semi-Major Axis: 8.48 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 127.9

Radius: 4.9

Gravity: 5.33 G

Time & Orbit

Eccentricity (e): 0.175

Orbit Range: 7 AU - 9.96 AU

Year: 15701 Days

Day: 21.1 Hours

Environment

Temp: -228 °C

Axial Tilt: 4.8 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (18)

Outer Limit: 82,420,490 km

• M1: 61,036 km (0.116 R)
• M2: 398,230 km (0.102 R)
• M3: 1,048,531 km (0.091 R)
• M4: 1,226,852 km (0.113 R)
• M5: 1,388,717 km (0.115 R)
• M6: 2,286,603 km (0.098 R)
• M7: 3,165,641 km (0.115 R)
• M8: 3,338,875 km (0.041 R)
• M9: 5,049,227 km (0.107 R)
• M10: 10,396,454 km (0.078 R)
• M11: 10,731,852 km (0.101 R)
• M12: 14,082,994 km (0.095 R)
• M13: 14,612,421 km (0.108 R)
• M14: 16,025,672 km (0.048 R)
• M15: 16,667,596 km (0.069 R)
• M16: 21,882,279 km (0.096 R)
• M17: 22,433,098 km (0.041 R)
• M18: 29,303,829 km (0.097 R)

Planet 7 - Ice Giant

Semi-Major Axis: 8.56 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 100

Radius: 6.5

Gravity: 2.37 G

Time & Orbit

Eccentricity (e): 0.233

Orbit Range: 6.57 AU - 10.55 AU

Year: 15924 Days

Day: 19.5 Hours

Environment

Temp: -224 °C

Axial Tilt: 19.2 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (23)

Outer Limit: 82,420,490 km

• M1: 80,783 km (0.087 R)
• M2: 287,826 km (0.116 R)
• M3: 503,995 km (0.079 R)
• M4: 884,123 km (0.065 R)
• M5: 1,195,437 km (0.11 R)
• M6: 1,656,198 km (0.096 R)
• M7: 2,907,135 km (0.085 R)
• M8: 5,221,564 km (0.095 R)
• M9: 5,487,399 km (0.103 R)
• M10: 6,574,378 km (0.097 R)
• M11: 7,132,677 km (0.108 R)
• M12: 10,178,190 km (0.075 R)
• M13: 12,112,192 km (0.102 R)
• M14: 12,318,038 km (0.082 R)
• M15: 13,994,432 km (0.07 R)
• M16: 16,187,537 km (0.081 R)
• M17: 16,500,496 km (0.115 R)
• M18: 17,660,627 km (0.064 R)
• M19: 19,571,889 km (0.054 R)
• M20: 22,768,946 km (0.109 R)
• M21: 23,399,949 km (0.111 R)
• M22: 27,079,907 km (0.091 R)
• M23: 27,609,933 km (0.092 R)

Planet 8 - Ice Giant

Semi-Major Axis: 10.08 AU

Status: Outer (Cold)

Composition: Methane/Ammonia Ices

Physical Data

Mass: 841.1

Radius: 4

Gravity: 52.57 G

Time & Orbit

Eccentricity (e): 0.158

Orbit Range: 8.49 AU - 11.67 AU

Year: 20348 Days

Day: 19.2 Hours

Environment

Temp: -233 °C

Axial Tilt: 0.5 °

Atmosphere: H₂, CH₄

Biome: None

Satellites (25)

Outer Limit: 82,420,490 km

• M1: 49,816 km (0.099 R)
• M2: 203,004 km (0.085 R)
• M3: 380,876 km (0.072 R)
• M4: 987,944 km (0.112 R)
• M5: 1,464,414 km (0.111 R)
• M6: 5,603,039 km (0.075 R)
• M7: 6,417,749 km (0.081 R)
• M8: 8,385,260 km (0.096 R)
• M9: 9,979,824 km (0.113 R)
• M10: 13,092,357 km (0.037 R)
• M11: 13,531,127 km (0.112 R)
• M12: 13,829,126 km (0.086 R)
• M13: 16,540,438 km (0.119 R)
• M14: 29,406,753 km (0.07 R)
• M15: 31,439,489 km (0.079 R)
• M16: 35,078,606 km (0.038 R)
• M17: 41,437,713 km (0.064 R)
• M18: 43,179,630 km (0.069 R)
• M19: 46,639,380 km (0.044 R)
• M20: 47,318,704 km (0.087 R)
• M21: 48,350,032 km (0.103 R)
• M22: 51,895,801 km (0.107 R)
• M23: 52,442,132 km (0.043 R)
• M24: 60,097,953 km (0.07 R)
• M25: 69,122,743 km (0.108 R)

Kuiper Belt

Range: 30 - 51 AU

Composition

Type: Dwarf Planets/TNOs (Ices)

Reservoir of dwarf planets and volatile ices.

Outer System

Oort Cloud

Range: 371 - 15,880 AU

Composition

Type: Cometary Reservoir

System's final boundary, containing trillions of icy planetesimals.

Gravitational Limit